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  A $\gamma$-ray determination of the Universe's star-formation history

The Fermi-LAT Collaboration, Ajello, M., Helgason, K., Paliya, V., Finke, J., Dominguez, A., et al. (2018). A $\gamma$-ray determination of the Universe's star-formation history. Science Magazine, (362), 1031. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2018-380.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0003-F971-5 Version Permalink: https://hdl.handle.net/21.11116/0000-0003-F972-4
Genre: Journal Article

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The Fermi-LAT Collaboration1, Author
Ajello, M.1, Author
Helgason, K.1, Author
Paliya, V.1, Author
Finke, J.1, Author
Dominguez, A.1, Author
Desai, A.1, Author
Affiliations:
1Max Planck Institute for Physics, Max Planck Society and Cooperation Partners, ou_2253650              

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Free keywords: Fermi
 Abstract: The light emitted by all galaxies over the history of the Universe produces the extragalactic background light (EBL) at ultraviolet, optical, and infrared wavelengths. The EBL is a source of opacity for $\gamma$ rays via photon-photon interactions, leaving an imprint in the spectra of distant $\gamma$-ray sources. We measure this attenuation using {739} active galaxies and one gamma-ray burst detected by the {\it Fermi} Large Area Telescope. This allows us to reconstruct the evolution of the EBL and determine the star-formation history of the Universe over 90\% of cosmic time. Our star-formation history is consistent with independent measurements from galaxy surveys, peaking at redshift $z\sim2$. Upper limits of the EBL at the epoch of re-ionization suggest a turnover in the abundance of faint galaxies at $z\sim 6$.

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 Dates: 2018
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 747378
URI: https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2018-380
URI: http://arXiv.org/abs/arxiv:1812.01031
URI: https://doi.org/10.1126/science.aat8123
URI: https://inspirehep.net/search?p=find+eprint+1812.01031
Other: MPP-2018-380
 Degree: -

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Title: Science Magazine
  Alternative Title : Science
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: (362) Sequence Number: - Start / End Page: 1031 Identifier: -